./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a93221bc263791497331acd2a7a0150037c621aa ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:36:17,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:36:17,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:36:17,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:36:17,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:36:17,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:36:17,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:36:17,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:36:17,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:36:17,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:36:17,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:36:17,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:36:17,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:36:17,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:36:17,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:36:17,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:36:17,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:36:17,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:36:17,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:36:17,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:36:17,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:36:17,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:36:17,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:36:17,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:36:17,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:36:17,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:36:17,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:36:17,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:36:17,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:36:17,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:36:17,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:36:17,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:36:17,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:36:17,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:36:17,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:36:17,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:36:17,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:36:17,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:36:17,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:36:17,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:36:17,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:36:17,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 23:36:18,045 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:36:18,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:36:18,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:36:18,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:36:18,048 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:36:18,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:36:18,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:36:18,049 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:36:18,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:36:18,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:36:18,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:36:18,051 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 23:36:18,051 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 23:36:18,052 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 23:36:18,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:36:18,052 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 23:36:18,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:36:18,053 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:36:18,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:36:18,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:36:18,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:36:18,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:36:18,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:36:18,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:36:18,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:36:18,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:36:18,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:36:18,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:36:18,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93221bc263791497331acd2a7a0150037c621aa [2020-11-29 23:36:18,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:36:18,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:36:18,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:36:18,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:36:18,398 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:36:18,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_11.c [2020-11-29 23:36:18,491 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/data/e505ec6dc/ce29d85758c14ee588e4448d9786257e/FLAGb361edf3b [2020-11-29 23:36:19,052 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:36:19,053 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/sv-benchmarks/c/locks/test_locks_11.c [2020-11-29 23:36:19,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/data/e505ec6dc/ce29d85758c14ee588e4448d9786257e/FLAGb361edf3b [2020-11-29 23:36:19,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/data/e505ec6dc/ce29d85758c14ee588e4448d9786257e [2020-11-29 23:36:19,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:36:19,440 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 23:36:19,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:36:19,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:36:19,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:36:19,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e3f2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19, skipping insertion in model container [2020-11-29 23:36:19,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:36:19,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:36:19,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:36:19,716 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:36:19,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:36:19,792 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:36:19,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19 WrapperNode [2020-11-29 23:36:19,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:36:19,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:36:19,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:36:19,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:36:19,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... [2020-11-29 23:36:19,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:36:19,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:36:19,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:36:19,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:36:19,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:36:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 23:36:19,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:36:19,936 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 23:36:19,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 23:36:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 23:36:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 23:36:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 23:36:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:36:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 23:36:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 23:36:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 23:36:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:36:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:36:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:36:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:36:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:36:20,479 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:36:20,479 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-29 23:36:20,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:20 BoogieIcfgContainer [2020-11-29 23:36:20,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:36:20,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:36:20,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:36:20,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:36:20,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:36:19" (1/3) ... [2020-11-29 23:36:20,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f0c639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:36:20, skipping insertion in model container [2020-11-29 23:36:20,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:19" (2/3) ... [2020-11-29 23:36:20,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f0c639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:36:20, skipping insertion in model container [2020-11-29 23:36:20,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:20" (3/3) ... [2020-11-29 23:36:20,493 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-11-29 23:36:20,506 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:36:20,512 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 23:36:20,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 23:36:20,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:36:20,552 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 23:36:20,552 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:36:20,553 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:36:20,553 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:36:20,553 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:36:20,553 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:36:20,554 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:36:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-11-29 23:36:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:36:20,578 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:20,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:20,579 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:20,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1012612054, now seen corresponding path program 1 times [2020-11-29 23:36:20,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:20,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496178961] [2020-11-29 23:36:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:20,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:20,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496178961] [2020-11-29 23:36:20,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:20,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:36:20,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564793109] [2020-11-29 23:36:20,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:36:20,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:20,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:36:20,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:36:20,929 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2020-11-29 23:36:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:20,989 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2020-11-29 23:36:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:36:20,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 23:36:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:21,030 INFO L225 Difference]: With dead ends: 49 [2020-11-29 23:36:21,030 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 23:36:21,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:36:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 23:36:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-29 23:36:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 23:36:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 76 transitions. [2020-11-29 23:36:21,073 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 76 transitions. Word has length 9 [2020-11-29 23:36:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:21,074 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 76 transitions. [2020-11-29 23:36:21,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:36:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 76 transitions. [2020-11-29 23:36:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 23:36:21,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:21,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:21,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:36:21,080 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2067841466, now seen corresponding path program 1 times [2020-11-29 23:36:21,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:21,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304685405] [2020-11-29 23:36:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:21,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304685405] [2020-11-29 23:36:21,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:21,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:21,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476093864] [2020-11-29 23:36:21,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:21,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:21,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:21,252 INFO L87 Difference]: Start difference. First operand 44 states and 76 transitions. Second operand 4 states. [2020-11-29 23:36:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:21,579 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2020-11-29 23:36:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:21,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-29 23:36:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:21,583 INFO L225 Difference]: With dead ends: 79 [2020-11-29 23:36:21,583 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 23:36:21,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 23:36:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-11-29 23:36:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 23:36:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 99 transitions. [2020-11-29 23:36:21,599 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 99 transitions. Word has length 23 [2020-11-29 23:36:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:21,599 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 99 transitions. [2020-11-29 23:36:21,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 99 transitions. [2020-11-29 23:36:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 23:36:21,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:21,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:21,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:36:21,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash 947262152, now seen corresponding path program 1 times [2020-11-29 23:36:21,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:21,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839182523] [2020-11-29 23:36:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:21,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:21,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839182523] [2020-11-29 23:36:21,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:21,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:21,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311890008] [2020-11-29 23:36:21,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:21,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:21,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:21,802 INFO L87 Difference]: Start difference. First operand 56 states and 99 transitions. Second operand 4 states. [2020-11-29 23:36:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:22,084 INFO L93 Difference]: Finished difference Result 79 states and 140 transitions. [2020-11-29 23:36:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:22,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-29 23:36:22,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:22,088 INFO L225 Difference]: With dead ends: 79 [2020-11-29 23:36:22,088 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 23:36:22,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 23:36:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-11-29 23:36:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 23:36:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 139 transitions. [2020-11-29 23:36:22,109 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 139 transitions. Word has length 23 [2020-11-29 23:36:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:22,110 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 139 transitions. [2020-11-29 23:36:22,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 139 transitions. [2020-11-29 23:36:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:36:22,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:22,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:22,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:36:22,113 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash 328021414, now seen corresponding path program 1 times [2020-11-29 23:36:22,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:22,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687988612] [2020-11-29 23:36:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:22,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:22,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687988612] [2020-11-29 23:36:22,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:22,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:22,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037664856] [2020-11-29 23:36:22,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:22,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:22,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:22,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:22,251 INFO L87 Difference]: Start difference. First operand 78 states and 139 transitions. Second operand 4 states. [2020-11-29 23:36:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:22,470 INFO L93 Difference]: Finished difference Result 82 states and 142 transitions. [2020-11-29 23:36:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:22,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-29 23:36:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:22,473 INFO L225 Difference]: With dead ends: 82 [2020-11-29 23:36:22,473 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 23:36:22,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 23:36:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-11-29 23:36:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-29 23:36:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 141 transitions. [2020-11-29 23:36:22,483 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 141 transitions. Word has length 24 [2020-11-29 23:36:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:22,484 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 141 transitions. [2020-11-29 23:36:22,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-11-29 23:36:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:36:22,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:22,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:22,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 23:36:22,486 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash -693046940, now seen corresponding path program 1 times [2020-11-29 23:36:22,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:22,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125511491] [2020-11-29 23:36:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:22,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:22,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125511491] [2020-11-29 23:36:22,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:22,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:22,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460942991] [2020-11-29 23:36:22,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:22,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:22,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:22,611 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 4 states. [2020-11-29 23:36:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:22,862 INFO L93 Difference]: Finished difference Result 149 states and 263 transitions. [2020-11-29 23:36:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:22,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-29 23:36:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:22,865 INFO L225 Difference]: With dead ends: 149 [2020-11-29 23:36:22,866 INFO L226 Difference]: Without dead ends: 149 [2020-11-29 23:36:22,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-29 23:36:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-11-29 23:36:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 23:36:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 262 transitions. [2020-11-29 23:36:22,889 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 262 transitions. Word has length 24 [2020-11-29 23:36:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:22,889 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 262 transitions. [2020-11-29 23:36:22,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 262 transitions. [2020-11-29 23:36:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:36:22,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:22,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:22,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 23:36:22,892 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash 586816738, now seen corresponding path program 1 times [2020-11-29 23:36:22,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:22,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381051303] [2020-11-29 23:36:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:23,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:23,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381051303] [2020-11-29 23:36:23,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:23,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:23,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293073162] [2020-11-29 23:36:23,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:23,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:23,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:23,032 INFO L87 Difference]: Start difference. First operand 148 states and 262 transitions. Second operand 4 states. [2020-11-29 23:36:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:23,258 INFO L93 Difference]: Finished difference Result 189 states and 337 transitions. [2020-11-29 23:36:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:23,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-29 23:36:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:23,262 INFO L225 Difference]: With dead ends: 189 [2020-11-29 23:36:23,262 INFO L226 Difference]: Without dead ends: 189 [2020-11-29 23:36:23,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-29 23:36:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2020-11-29 23:36:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 23:36:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 260 transitions. [2020-11-29 23:36:23,283 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 260 transitions. Word has length 24 [2020-11-29 23:36:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:23,284 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 260 transitions. [2020-11-29 23:36:23,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 260 transitions. [2020-11-29 23:36:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 23:36:23,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:23,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:23,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 23:36:23,287 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -3010669, now seen corresponding path program 1 times [2020-11-29 23:36:23,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:23,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165634571] [2020-11-29 23:36:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:23,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:23,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165634571] [2020-11-29 23:36:23,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:23,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:23,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055567393] [2020-11-29 23:36:23,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:23,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:23,413 INFO L87 Difference]: Start difference. First operand 148 states and 260 transitions. Second operand 4 states. [2020-11-29 23:36:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:23,649 INFO L93 Difference]: Finished difference Result 273 states and 487 transitions. [2020-11-29 23:36:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:23,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 23:36:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:23,653 INFO L225 Difference]: With dead ends: 273 [2020-11-29 23:36:23,653 INFO L226 Difference]: Without dead ends: 273 [2020-11-29 23:36:23,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-11-29 23:36:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 200. [2020-11-29 23:36:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-29 23:36:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 350 transitions. [2020-11-29 23:36:23,675 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 350 transitions. Word has length 25 [2020-11-29 23:36:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:23,676 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 350 transitions. [2020-11-29 23:36:23,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 350 transitions. [2020-11-29 23:36:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 23:36:23,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:23,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:23,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 23:36:23,682 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:23,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1282874347, now seen corresponding path program 1 times [2020-11-29 23:36:23,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:23,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572051695] [2020-11-29 23:36:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:23,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:23,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572051695] [2020-11-29 23:36:23,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:23,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:23,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300006742] [2020-11-29 23:36:23,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:23,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:23,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:23,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:23,780 INFO L87 Difference]: Start difference. First operand 200 states and 350 transitions. Second operand 4 states. [2020-11-29 23:36:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:23,998 INFO L93 Difference]: Finished difference Result 281 states and 489 transitions. [2020-11-29 23:36:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:23,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 23:36:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:24,001 INFO L225 Difference]: With dead ends: 281 [2020-11-29 23:36:24,002 INFO L226 Difference]: Without dead ends: 281 [2020-11-29 23:36:24,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-29 23:36:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2020-11-29 23:36:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-11-29 23:36:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 488 transitions. [2020-11-29 23:36:24,022 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 488 transitions. Word has length 25 [2020-11-29 23:36:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:24,022 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 488 transitions. [2020-11-29 23:36:24,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 488 transitions. [2020-11-29 23:36:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 23:36:24,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:24,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:24,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 23:36:24,036 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -86712177, now seen corresponding path program 1 times [2020-11-29 23:36:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:24,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874154163] [2020-11-29 23:36:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:24,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:24,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874154163] [2020-11-29 23:36:24,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:24,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:24,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699097020] [2020-11-29 23:36:24,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:24,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:24,114 INFO L87 Difference]: Start difference. First operand 280 states and 488 transitions. Second operand 4 states. [2020-11-29 23:36:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:24,329 INFO L93 Difference]: Finished difference Result 287 states and 493 transitions. [2020-11-29 23:36:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:24,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-29 23:36:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:24,332 INFO L225 Difference]: With dead ends: 287 [2020-11-29 23:36:24,332 INFO L226 Difference]: Without dead ends: 287 [2020-11-29 23:36:24,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-29 23:36:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-11-29 23:36:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-11-29 23:36:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 492 transitions. [2020-11-29 23:36:24,350 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 492 transitions. Word has length 26 [2020-11-29 23:36:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:24,350 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 492 transitions. [2020-11-29 23:36:24,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 492 transitions. [2020-11-29 23:36:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 23:36:24,356 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:24,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:24,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 23:36:24,358 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:24,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1107780531, now seen corresponding path program 1 times [2020-11-29 23:36:24,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:24,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356491861] [2020-11-29 23:36:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:24,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:24,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356491861] [2020-11-29 23:36:24,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:24,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:24,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790506321] [2020-11-29 23:36:24,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:24,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:24,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:24,455 INFO L87 Difference]: Start difference. First operand 286 states and 492 transitions. Second operand 4 states. [2020-11-29 23:36:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:24,684 INFO L93 Difference]: Finished difference Result 523 states and 909 transitions. [2020-11-29 23:36:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:24,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-29 23:36:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:24,689 INFO L225 Difference]: With dead ends: 523 [2020-11-29 23:36:24,689 INFO L226 Difference]: Without dead ends: 523 [2020-11-29 23:36:24,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-11-29 23:36:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 394. [2020-11-29 23:36:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-11-29 23:36:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 668 transitions. [2020-11-29 23:36:24,706 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 668 transitions. Word has length 26 [2020-11-29 23:36:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:24,706 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 668 transitions. [2020-11-29 23:36:24,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 668 transitions. [2020-11-29 23:36:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 23:36:24,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:24,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:24,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 23:36:24,708 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:24,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1907323087, now seen corresponding path program 1 times [2020-11-29 23:36:24,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:24,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340523941] [2020-11-29 23:36:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:24,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:24,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340523941] [2020-11-29 23:36:24,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:24,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:24,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794914473] [2020-11-29 23:36:24,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:24,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:24,794 INFO L87 Difference]: Start difference. First operand 394 states and 668 transitions. Second operand 4 states. [2020-11-29 23:36:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:25,010 INFO L93 Difference]: Finished difference Result 547 states and 921 transitions. [2020-11-29 23:36:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:25,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-29 23:36:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:25,015 INFO L225 Difference]: With dead ends: 547 [2020-11-29 23:36:25,015 INFO L226 Difference]: Without dead ends: 547 [2020-11-29 23:36:25,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-11-29 23:36:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2020-11-29 23:36:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-11-29 23:36:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 920 transitions. [2020-11-29 23:36:25,040 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 920 transitions. Word has length 26 [2020-11-29 23:36:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:25,041 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 920 transitions. [2020-11-29 23:36:25,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 920 transitions. [2020-11-29 23:36:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:36:25,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:25,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:25,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 23:36:25,045 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash 25171040, now seen corresponding path program 1 times [2020-11-29 23:36:25,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:25,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100752164] [2020-11-29 23:36:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:25,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:25,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100752164] [2020-11-29 23:36:25,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:25,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:25,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385806142] [2020-11-29 23:36:25,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:25,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:25,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:25,140 INFO L87 Difference]: Start difference. First operand 546 states and 920 transitions. Second operand 4 states. [2020-11-29 23:36:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:25,357 INFO L93 Difference]: Finished difference Result 555 states and 921 transitions. [2020-11-29 23:36:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:25,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-29 23:36:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:25,362 INFO L225 Difference]: With dead ends: 555 [2020-11-29 23:36:25,362 INFO L226 Difference]: Without dead ends: 555 [2020-11-29 23:36:25,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-11-29 23:36:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 554. [2020-11-29 23:36:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-11-29 23:36:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 920 transitions. [2020-11-29 23:36:25,383 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 920 transitions. Word has length 27 [2020-11-29 23:36:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:25,385 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 920 transitions. [2020-11-29 23:36:25,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 920 transitions. [2020-11-29 23:36:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:36:25,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:25,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:25,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 23:36:25,387 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:25,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:25,388 INFO L82 PathProgramCache]: Analyzing trace with hash -995897314, now seen corresponding path program 1 times [2020-11-29 23:36:25,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:25,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703239762] [2020-11-29 23:36:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:25,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:25,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703239762] [2020-11-29 23:36:25,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:25,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40019403] [2020-11-29 23:36:25,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:25,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:25,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:25,455 INFO L87 Difference]: Start difference. First operand 554 states and 920 transitions. Second operand 4 states. [2020-11-29 23:36:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:25,646 INFO L93 Difference]: Finished difference Result 1003 states and 1681 transitions. [2020-11-29 23:36:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:25,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-29 23:36:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:25,654 INFO L225 Difference]: With dead ends: 1003 [2020-11-29 23:36:25,654 INFO L226 Difference]: Without dead ends: 1003 [2020-11-29 23:36:25,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-11-29 23:36:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 778. [2020-11-29 23:36:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-11-29 23:36:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1264 transitions. [2020-11-29 23:36:25,685 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1264 transitions. Word has length 27 [2020-11-29 23:36:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:25,686 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1264 transitions. [2020-11-29 23:36:25,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1264 transitions. [2020-11-29 23:36:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:36:25,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:25,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:25,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 23:36:25,689 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2019206304, now seen corresponding path program 1 times [2020-11-29 23:36:25,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:25,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408061358] [2020-11-29 23:36:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:25,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:25,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408061358] [2020-11-29 23:36:25,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:25,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:25,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352873236] [2020-11-29 23:36:25,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:25,779 INFO L87 Difference]: Start difference. First operand 778 states and 1264 transitions. Second operand 4 states. [2020-11-29 23:36:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:25,993 INFO L93 Difference]: Finished difference Result 1067 states and 1721 transitions. [2020-11-29 23:36:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:25,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-29 23:36:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:26,001 INFO L225 Difference]: With dead ends: 1067 [2020-11-29 23:36:26,002 INFO L226 Difference]: Without dead ends: 1067 [2020-11-29 23:36:26,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-11-29 23:36:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1066. [2020-11-29 23:36:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-11-29 23:36:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1720 transitions. [2020-11-29 23:36:26,039 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1720 transitions. Word has length 27 [2020-11-29 23:36:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:26,040 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1720 transitions. [2020-11-29 23:36:26,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1720 transitions. [2020-11-29 23:36:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:36:26,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:26,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:26,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 23:36:26,042 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:26,043 INFO L82 PathProgramCache]: Analyzing trace with hash -801405958, now seen corresponding path program 1 times [2020-11-29 23:36:26,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:26,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132530776] [2020-11-29 23:36:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:26,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:26,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132530776] [2020-11-29 23:36:26,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:26,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580100024] [2020-11-29 23:36:26,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:26,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:26,115 INFO L87 Difference]: Start difference. First operand 1066 states and 1720 transitions. Second operand 4 states. [2020-11-29 23:36:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:26,307 INFO L93 Difference]: Finished difference Result 1083 states and 1721 transitions. [2020-11-29 23:36:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:26,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-29 23:36:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:26,314 INFO L225 Difference]: With dead ends: 1083 [2020-11-29 23:36:26,314 INFO L226 Difference]: Without dead ends: 1083 [2020-11-29 23:36:26,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-11-29 23:36:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1082. [2020-11-29 23:36:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1082 states. [2020-11-29 23:36:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1720 transitions. [2020-11-29 23:36:26,350 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1720 transitions. Word has length 28 [2020-11-29 23:36:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:26,351 INFO L481 AbstractCegarLoop]: Abstraction has 1082 states and 1720 transitions. [2020-11-29 23:36:26,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1720 transitions. [2020-11-29 23:36:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:36:26,353 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:26,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:26,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 23:36:26,353 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:26,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:26,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1822474312, now seen corresponding path program 1 times [2020-11-29 23:36:26,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:26,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99127012] [2020-11-29 23:36:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:26,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:26,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99127012] [2020-11-29 23:36:26,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:26,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:26,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732719994] [2020-11-29 23:36:26,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:26,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:26,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:26,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:26,441 INFO L87 Difference]: Start difference. First operand 1082 states and 1720 transitions. Second operand 4 states. [2020-11-29 23:36:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:26,661 INFO L93 Difference]: Finished difference Result 1931 states and 3097 transitions. [2020-11-29 23:36:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:26,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-29 23:36:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:26,673 INFO L225 Difference]: With dead ends: 1931 [2020-11-29 23:36:26,674 INFO L226 Difference]: Without dead ends: 1931 [2020-11-29 23:36:26,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-11-29 23:36:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1546. [2020-11-29 23:36:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-11-29 23:36:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2392 transitions. [2020-11-29 23:36:26,732 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2392 transitions. Word has length 28 [2020-11-29 23:36:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:26,732 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2392 transitions. [2020-11-29 23:36:26,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2392 transitions. [2020-11-29 23:36:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:36:26,735 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:26,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:26,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-29 23:36:26,736 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1192629306, now seen corresponding path program 1 times [2020-11-29 23:36:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:26,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186096196] [2020-11-29 23:36:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:26,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:26,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186096196] [2020-11-29 23:36:26,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:26,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:26,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666831788] [2020-11-29 23:36:26,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:26,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:26,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:26,802 INFO L87 Difference]: Start difference. First operand 1546 states and 2392 transitions. Second operand 4 states. [2020-11-29 23:36:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:27,028 INFO L93 Difference]: Finished difference Result 2091 states and 3209 transitions. [2020-11-29 23:36:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:27,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-29 23:36:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:27,042 INFO L225 Difference]: With dead ends: 2091 [2020-11-29 23:36:27,042 INFO L226 Difference]: Without dead ends: 2091 [2020-11-29 23:36:27,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-11-29 23:36:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2090. [2020-11-29 23:36:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-11-29 23:36:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3208 transitions. [2020-11-29 23:36:27,107 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3208 transitions. Word has length 28 [2020-11-29 23:36:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:27,108 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3208 transitions. [2020-11-29 23:36:27,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3208 transitions. [2020-11-29 23:36:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 23:36:27,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:27,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:27,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-29 23:36:27,111 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:27,112 INFO L82 PathProgramCache]: Analyzing trace with hash -655478549, now seen corresponding path program 1 times [2020-11-29 23:36:27,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:27,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097662443] [2020-11-29 23:36:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097662443] [2020-11-29 23:36:27,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:27,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:27,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643864547] [2020-11-29 23:36:27,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:27,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:27,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:27,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:27,178 INFO L87 Difference]: Start difference. First operand 2090 states and 3208 transitions. Second operand 4 states. [2020-11-29 23:36:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:27,414 INFO L93 Difference]: Finished difference Result 2123 states and 3209 transitions. [2020-11-29 23:36:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:27,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-29 23:36:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:27,427 INFO L225 Difference]: With dead ends: 2123 [2020-11-29 23:36:27,427 INFO L226 Difference]: Without dead ends: 2123 [2020-11-29 23:36:27,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-11-29 23:36:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2122. [2020-11-29 23:36:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2122 states. [2020-11-29 23:36:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3208 transitions. [2020-11-29 23:36:27,499 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3208 transitions. Word has length 29 [2020-11-29 23:36:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:27,500 INFO L481 AbstractCegarLoop]: Abstraction has 2122 states and 3208 transitions. [2020-11-29 23:36:27,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3208 transitions. [2020-11-29 23:36:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 23:36:27,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:27,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:27,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-29 23:36:27,503 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:27,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:27,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1676546903, now seen corresponding path program 1 times [2020-11-29 23:36:27,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:27,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431060319] [2020-11-29 23:36:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:27,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:27,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431060319] [2020-11-29 23:36:27,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:27,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:27,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990544057] [2020-11-29 23:36:27,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:27,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:27,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:27,561 INFO L87 Difference]: Start difference. First operand 2122 states and 3208 transitions. Second operand 4 states. [2020-11-29 23:36:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:27,788 INFO L93 Difference]: Finished difference Result 3723 states and 5673 transitions. [2020-11-29 23:36:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:27,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-29 23:36:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:27,810 INFO L225 Difference]: With dead ends: 3723 [2020-11-29 23:36:27,810 INFO L226 Difference]: Without dead ends: 3723 [2020-11-29 23:36:27,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-11-29 23:36:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3082. [2020-11-29 23:36:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3082 states. [2020-11-29 23:36:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4520 transitions. [2020-11-29 23:36:27,921 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4520 transitions. Word has length 29 [2020-11-29 23:36:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:27,922 INFO L481 AbstractCegarLoop]: Abstraction has 3082 states and 4520 transitions. [2020-11-29 23:36:27,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4520 transitions. [2020-11-29 23:36:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 23:36:27,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:27,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:27,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-29 23:36:27,927 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1338556715, now seen corresponding path program 1 times [2020-11-29 23:36:27,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:27,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258326843] [2020-11-29 23:36:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:28,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:28,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258326843] [2020-11-29 23:36:28,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:28,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:28,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024123052] [2020-11-29 23:36:28,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:28,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:28,018 INFO L87 Difference]: Start difference. First operand 3082 states and 4520 transitions. Second operand 4 states. [2020-11-29 23:36:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:28,216 INFO L93 Difference]: Finished difference Result 4107 states and 5961 transitions. [2020-11-29 23:36:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:28,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-29 23:36:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:28,238 INFO L225 Difference]: With dead ends: 4107 [2020-11-29 23:36:28,238 INFO L226 Difference]: Without dead ends: 4107 [2020-11-29 23:36:28,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-11-29 23:36:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4106. [2020-11-29 23:36:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4106 states. [2020-11-29 23:36:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5960 transitions. [2020-11-29 23:36:28,368 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5960 transitions. Word has length 29 [2020-11-29 23:36:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:28,369 INFO L481 AbstractCegarLoop]: Abstraction has 4106 states and 5960 transitions. [2020-11-29 23:36:28,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5960 transitions. [2020-11-29 23:36:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 23:36:28,374 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:28,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:28,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-29 23:36:28,375 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash -426685595, now seen corresponding path program 1 times [2020-11-29 23:36:28,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:28,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165488631] [2020-11-29 23:36:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:28,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165488631] [2020-11-29 23:36:28,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:28,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669543329] [2020-11-29 23:36:28,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:28,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:28,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:28,434 INFO L87 Difference]: Start difference. First operand 4106 states and 5960 transitions. Second operand 4 states. [2020-11-29 23:36:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:28,667 INFO L93 Difference]: Finished difference Result 4171 states and 5961 transitions. [2020-11-29 23:36:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:28,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-29 23:36:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:28,711 INFO L225 Difference]: With dead ends: 4171 [2020-11-29 23:36:28,712 INFO L226 Difference]: Without dead ends: 4171 [2020-11-29 23:36:28,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-11-29 23:36:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4170. [2020-11-29 23:36:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-11-29 23:36:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5960 transitions. [2020-11-29 23:36:28,825 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5960 transitions. Word has length 30 [2020-11-29 23:36:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:28,825 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 5960 transitions. [2020-11-29 23:36:28,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5960 transitions. [2020-11-29 23:36:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 23:36:28,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:28,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:28,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-29 23:36:28,834 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1447753949, now seen corresponding path program 1 times [2020-11-29 23:36:28,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:28,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601281275] [2020-11-29 23:36:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:28,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:28,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601281275] [2020-11-29 23:36:28,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:28,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:28,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322642399] [2020-11-29 23:36:28,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:28,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:28,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:28,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:28,896 INFO L87 Difference]: Start difference. First operand 4170 states and 5960 transitions. Second operand 4 states. [2020-11-29 23:36:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:29,112 INFO L93 Difference]: Finished difference Result 7179 states and 10313 transitions. [2020-11-29 23:36:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:29,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-29 23:36:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:29,129 INFO L225 Difference]: With dead ends: 7179 [2020-11-29 23:36:29,129 INFO L226 Difference]: Without dead ends: 7179 [2020-11-29 23:36:29,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2020-11-29 23:36:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6154. [2020-11-29 23:36:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6154 states. [2020-11-29 23:36:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 8520 transitions. [2020-11-29 23:36:29,306 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 8520 transitions. Word has length 30 [2020-11-29 23:36:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:29,307 INFO L481 AbstractCegarLoop]: Abstraction has 6154 states and 8520 transitions. [2020-11-29 23:36:29,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 8520 transitions. [2020-11-29 23:36:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 23:36:29,316 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:29,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:29,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-29 23:36:29,316 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1567349669, now seen corresponding path program 1 times [2020-11-29 23:36:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:29,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568630569] [2020-11-29 23:36:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:29,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:29,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568630569] [2020-11-29 23:36:29,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:29,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:29,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85719303] [2020-11-29 23:36:29,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:29,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:29,394 INFO L87 Difference]: Start difference. First operand 6154 states and 8520 transitions. Second operand 4 states. [2020-11-29 23:36:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:29,624 INFO L93 Difference]: Finished difference Result 8075 states and 11017 transitions. [2020-11-29 23:36:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:29,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-29 23:36:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:29,642 INFO L225 Difference]: With dead ends: 8075 [2020-11-29 23:36:29,643 INFO L226 Difference]: Without dead ends: 8075 [2020-11-29 23:36:29,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2020-11-29 23:36:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8074. [2020-11-29 23:36:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8074 states. [2020-11-29 23:36:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8074 states to 8074 states and 11016 transitions. [2020-11-29 23:36:29,872 INFO L78 Accepts]: Start accepts. Automaton has 8074 states and 11016 transitions. Word has length 30 [2020-11-29 23:36:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:29,873 INFO L481 AbstractCegarLoop]: Abstraction has 8074 states and 11016 transitions. [2020-11-29 23:36:29,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8074 states and 11016 transitions. [2020-11-29 23:36:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 23:36:29,884 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:29,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:29,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-29 23:36:29,884 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1924028042, now seen corresponding path program 1 times [2020-11-29 23:36:29,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:29,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449799881] [2020-11-29 23:36:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:29,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:29,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449799881] [2020-11-29 23:36:29,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:29,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732959615] [2020-11-29 23:36:29,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:29,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:29,955 INFO L87 Difference]: Start difference. First operand 8074 states and 11016 transitions. Second operand 4 states. [2020-11-29 23:36:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:30,165 INFO L93 Difference]: Finished difference Result 8203 states and 11017 transitions. [2020-11-29 23:36:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:30,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-29 23:36:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:30,182 INFO L225 Difference]: With dead ends: 8203 [2020-11-29 23:36:30,182 INFO L226 Difference]: Without dead ends: 8203 [2020-11-29 23:36:30,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2020-11-29 23:36:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8202. [2020-11-29 23:36:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8202 states. [2020-11-29 23:36:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 11016 transitions. [2020-11-29 23:36:30,408 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 11016 transitions. Word has length 31 [2020-11-29 23:36:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:30,409 INFO L481 AbstractCegarLoop]: Abstraction has 8202 states and 11016 transitions. [2020-11-29 23:36:30,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 11016 transitions. [2020-11-29 23:36:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 23:36:30,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:30,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:30,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-29 23:36:30,420 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1349870900, now seen corresponding path program 1 times [2020-11-29 23:36:30,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:30,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860544921] [2020-11-29 23:36:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:30,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860544921] [2020-11-29 23:36:30,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:30,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:30,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607762258] [2020-11-29 23:36:30,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:30,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:30,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:30,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:30,481 INFO L87 Difference]: Start difference. First operand 8202 states and 11016 transitions. Second operand 4 states. [2020-11-29 23:36:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:30,692 INFO L93 Difference]: Finished difference Result 13835 states and 18569 transitions. [2020-11-29 23:36:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:30,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-29 23:36:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:30,725 INFO L225 Difference]: With dead ends: 13835 [2020-11-29 23:36:30,725 INFO L226 Difference]: Without dead ends: 13835 [2020-11-29 23:36:30,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2020-11-29 23:36:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12298. [2020-11-29 23:36:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12298 states. [2020-11-29 23:36:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 16008 transitions. [2020-11-29 23:36:31,031 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 16008 transitions. Word has length 31 [2020-11-29 23:36:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:31,032 INFO L481 AbstractCegarLoop]: Abstraction has 12298 states and 16008 transitions. [2020-11-29 23:36:31,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 16008 transitions. [2020-11-29 23:36:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 23:36:31,052 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:31,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:31,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-29 23:36:31,053 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 70007222, now seen corresponding path program 1 times [2020-11-29 23:36:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:31,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211654343] [2020-11-29 23:36:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:31,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:31,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211654343] [2020-11-29 23:36:31,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:31,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:31,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49512213] [2020-11-29 23:36:31,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:31,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:31,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:31,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:31,114 INFO L87 Difference]: Start difference. First operand 12298 states and 16008 transitions. Second operand 4 states. [2020-11-29 23:36:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:31,423 INFO L93 Difference]: Finished difference Result 15883 states and 20233 transitions. [2020-11-29 23:36:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:31,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-29 23:36:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:31,456 INFO L225 Difference]: With dead ends: 15883 [2020-11-29 23:36:31,457 INFO L226 Difference]: Without dead ends: 15883 [2020-11-29 23:36:31,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2020-11-29 23:36:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15882. [2020-11-29 23:36:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-11-29 23:36:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 20232 transitions. [2020-11-29 23:36:31,788 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 20232 transitions. Word has length 31 [2020-11-29 23:36:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:31,788 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 20232 transitions. [2020-11-29 23:36:31,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 20232 transitions. [2020-11-29 23:36:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 23:36:31,809 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:31,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:31,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-29 23:36:31,810 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:31,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1096993072, now seen corresponding path program 1 times [2020-11-29 23:36:31,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:31,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737721005] [2020-11-29 23:36:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:31,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737721005] [2020-11-29 23:36:31,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:31,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:31,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327893771] [2020-11-29 23:36:31,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:31,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:31,875 INFO L87 Difference]: Start difference. First operand 15882 states and 20232 transitions. Second operand 4 states. [2020-11-29 23:36:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:32,130 INFO L93 Difference]: Finished difference Result 16139 states and 20233 transitions. [2020-11-29 23:36:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:32,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-29 23:36:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:32,165 INFO L225 Difference]: With dead ends: 16139 [2020-11-29 23:36:32,165 INFO L226 Difference]: Without dead ends: 16139 [2020-11-29 23:36:32,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-11-29 23:36:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-11-29 23:36:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-11-29 23:36:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20232 transitions. [2020-11-29 23:36:32,507 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20232 transitions. Word has length 32 [2020-11-29 23:36:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:32,507 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20232 transitions. [2020-11-29 23:36:32,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20232 transitions. [2020-11-29 23:36:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 23:36:32,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:32,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:32,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-29 23:36:32,526 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2118061426, now seen corresponding path program 1 times [2020-11-29 23:36:32,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:32,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262263376] [2020-11-29 23:36:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:32,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:32,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262263376] [2020-11-29 23:36:32,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:32,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:32,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077590331] [2020-11-29 23:36:32,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:32,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:32,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:32,659 INFO L87 Difference]: Start difference. First operand 16138 states and 20232 transitions. Second operand 4 states. [2020-11-29 23:36:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:32,895 INFO L93 Difference]: Finished difference Result 31243 states and 37385 transitions. [2020-11-29 23:36:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:32,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-29 23:36:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:32,951 INFO L225 Difference]: With dead ends: 31243 [2020-11-29 23:36:32,951 INFO L226 Difference]: Without dead ends: 31243 [2020-11-29 23:36:32,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2020-11-29 23:36:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31242. [2020-11-29 23:36:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-11-29 23:36:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 37384 transitions. [2020-11-29 23:36:33,597 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 37384 transitions. Word has length 32 [2020-11-29 23:36:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:33,597 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 37384 transitions. [2020-11-29 23:36:33,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 37384 transitions. [2020-11-29 23:36:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 23:36:33,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:33,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:33,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-29 23:36:33,657 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash -838197748, now seen corresponding path program 1 times [2020-11-29 23:36:33,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:33,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343411763] [2020-11-29 23:36:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:33,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:33,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343411763] [2020-11-29 23:36:33,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:33,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:33,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257642532] [2020-11-29 23:36:33,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:33,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:33,729 INFO L87 Difference]: Start difference. First operand 31242 states and 37384 transitions. Second operand 4 states. [2020-11-29 23:36:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:34,012 INFO L93 Difference]: Finished difference Result 33291 states and 39945 transitions. [2020-11-29 23:36:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:34,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-29 23:36:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:34,280 INFO L225 Difference]: With dead ends: 33291 [2020-11-29 23:36:34,281 INFO L226 Difference]: Without dead ends: 33291 [2020-11-29 23:36:34,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2020-11-29 23:36:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31242. [2020-11-29 23:36:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-11-29 23:36:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 36872 transitions. [2020-11-29 23:36:34,801 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 36872 transitions. Word has length 32 [2020-11-29 23:36:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:34,801 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 36872 transitions. [2020-11-29 23:36:34,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 36872 transitions. [2020-11-29 23:36:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 23:36:34,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:34,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:34,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-29 23:36:34,859 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1228702207, now seen corresponding path program 1 times [2020-11-29 23:36:34,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:34,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101842039] [2020-11-29 23:36:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:34,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:34,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101842039] [2020-11-29 23:36:34,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:34,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:34,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702543201] [2020-11-29 23:36:34,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:34,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:34,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:34,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:34,926 INFO L87 Difference]: Start difference. First operand 31242 states and 36872 transitions. Second operand 4 states. [2020-11-29 23:36:35,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:35,371 INFO L93 Difference]: Finished difference Result 50698 states and 58376 transitions. [2020-11-29 23:36:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:35,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-29 23:36:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:35,444 INFO L225 Difference]: With dead ends: 50698 [2020-11-29 23:36:35,445 INFO L226 Difference]: Without dead ends: 50698 [2020-11-29 23:36:35,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2020-11-29 23:36:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 48650. [2020-11-29 23:36:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48650 states. [2020-11-29 23:36:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48650 states to 48650 states and 56328 transitions. [2020-11-29 23:36:36,376 INFO L78 Accepts]: Start accepts. Automaton has 48650 states and 56328 transitions. Word has length 33 [2020-11-29 23:36:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:36,376 INFO L481 AbstractCegarLoop]: Abstraction has 48650 states and 56328 transitions. [2020-11-29 23:36:36,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 48650 states and 56328 transitions. [2020-11-29 23:36:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 23:36:36,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:36,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:36,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-29 23:36:36,423 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:36:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1786401411, now seen corresponding path program 1 times [2020-11-29 23:36:36,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:36,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793654508] [2020-11-29 23:36:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:36,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:36:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:36,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793654508] [2020-11-29 23:36:36,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:36,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:36,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974596698] [2020-11-29 23:36:36,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:36,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:36,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:36,482 INFO L87 Difference]: Start difference. First operand 48650 states and 56328 transitions. Second operand 4 states. [2020-11-29 23:36:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:36,943 INFO L93 Difference]: Finished difference Result 60935 states and 67590 transitions. [2020-11-29 23:36:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:36,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-29 23:36:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:36,944 INFO L225 Difference]: With dead ends: 60935 [2020-11-29 23:36:36,944 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 23:36:36,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:36:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 23:36:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 23:36:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 23:36:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 23:36:36,946 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-11-29 23:36:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:36,946 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:36:36,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:36:36,946 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 23:36:36,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-29 23:36:36,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:36:36 BoogieIcfgContainer [2020-11-29 23:36:36,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:36:36,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:36:36,953 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:36:36,954 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:36:36,954 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:20" (3/4) ... [2020-11-29 23:36:36,957 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 23:36:36,963 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-29 23:36:36,963 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 23:36:36,964 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 23:36:36,977 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-29 23:36:36,977 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 23:36:36,978 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 23:36:36,978 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 23:36:37,044 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fcdfe6b9-6aab-4a7b-a182-3d8726cc4b47/bin/uautomizer/witness.graphml [2020-11-29 23:36:37,044 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:36:37,046 INFO L168 Benchmark]: Toolchain (without parser) took 17605.51 ms. Allocated memory was 107.0 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 71.7 MB in the beginning and 2.2 GB in the end (delta: -2.2 GB). Peak memory consumption was 451.8 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:37,047 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 107.0 MB. Free memory was 77.7 MB in the beginning and 77.7 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:36:37,048 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.40 ms. Allocated memory is still 107.0 MB. Free memory was 71.6 MB in the beginning and 82.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:37,048 INFO L168 Benchmark]: Boogie Preprocessor took 50.22 ms. Allocated memory is still 107.0 MB. Free memory was 82.9 MB in the beginning and 81.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:37,049 INFO L168 Benchmark]: RCFGBuilder took 635.10 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 59.5 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:37,049 INFO L168 Benchmark]: TraceAbstraction took 16469.05 ms. Allocated memory was 107.0 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 59.1 MB in the beginning and 2.2 GB in the end (delta: -2.2 GB). Peak memory consumption was 435.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:37,049 INFO L168 Benchmark]: Witness Printer took 90.90 ms. Allocated memory is still 2.7 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:37,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 107.0 MB. Free memory was 77.7 MB in the beginning and 77.7 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.40 ms. Allocated memory is still 107.0 MB. Free memory was 71.6 MB in the beginning and 82.9 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.22 ms. Allocated memory is still 107.0 MB. Free memory was 82.9 MB in the beginning and 81.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 635.10 ms. Allocated memory is still 107.0 MB. Free memory was 80.9 MB in the beginning and 59.5 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16469.05 ms. Allocated memory was 107.0 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 59.1 MB in the beginning and 2.2 GB in the end (delta: -2.2 GB). Peak memory consumption was 435.6 MB. Max. memory is 16.1 GB. * Witness Printer took 90.90 ms. Allocated memory is still 2.7 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 53 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.3s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2900 SDtfs, 4219 SDslu, 232 SDs, 0 SdLazy, 2029 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48650occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 8194 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 852 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 821 ConstructedInterpolants, 0 QuantifiedInterpolants, 67886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...